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The phylogenetic tree inferred from 16S rRNA gene sequences showing the positions of bacteria within the order Myxococcales. The sequence of Desulfovibrio desulfuricans ATCC 27774 roots the tree. Scale bars: 0.1 substitutions per nucleotide position. Suborder-level clusters are indicated by 20 different colors (as shown in Table S2) on the branches of the tree, and environmental categories of all sequences are indicated by the 10 different colors in the outer ring of the tree.
